Download media by ID. Use the media.id field from incoming message events.
AI agents call whatsapp_download_media to retrieve information from WSAPI WhatsApp MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves media content from WhatsApp using an identifier from messages. This is a read-only operation analogous to fetching or downloading a file. No state changes, message modifications, contact alterations, or destructive actions occur. The risk is low because the tool only accesses already-received media that the requesting agent/user has legitimate access to.
From the tool's definition Tool description states 'Download media by ID' — this is a retrieval operation with no side effects. It fetches existing media content without modifying, deleting, or executing operations.
Attacks that exploit this kind of access
Download media by ID. Use the media.id field from incoming message events. It is categorised as a Read tool in the WSAPI WhatsApp MCP Server MCP Server, which means it retrieves data without modifying state.
Register the WSAPI WhatsApp MCP Server MCP server in PolicyLayer and add a rule for whatsapp_download_media: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches WSAPI WhatsApp MCP Server. Nothing to install.
whatsapp_download_media is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the whatsapp_download_media rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for whatsapp_download_media. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
whatsapp_download_media is provided by the WSAPI WhatsApp MCP Server MCP server (wsapi-chat/wsapi-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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